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Model: CISCO3925/K9 Cisco 3925 Router 3900 Series ISR G2
Detail: Cisco 3925 Router w/SPE100(3GE,4EHWIC,4DSP,2SM,256MBCF,1GBDRAM,IPB)
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Overview (CISCO3925/K9)

The Cisco 3925 router, modular Services Performance Engine (SPE) 100, which can be upgraded for even higher performance as next-generation WAN environments evolve.

Quick Specs

Figure 1 shows the appearance of the CISCO3925/K9.


Table 1 shows the Quick Specs of the CISCO3925/K9.

Product Code


Services Performance Engine module

w/SPE 100

Rack Units



3 integrated 10/100/1000 Ethernet ports with 2 ports capable of RJ-45 or SFP connectivity

Expansion Slot(s)

2 service module slots

1 Internal Services Module slot

4 onboard digital signal processor (DSP) slots

4 Enhanced High-Speed WAN Interface Card (EHWIC) slots


1 GB (installed) / 2 GB (max)

Flash Memory

256 MB (installed) / 8 GB (max)


47.6 cm x 43.8 cm x 13.3 cm

Package Weight

27.78 Kg

Product Details

Figure 2 shows the front panel of the Cisco 3925 router.

CISCO3925/K9 Front panel


① On/Off switch ② Power connector ③ LEDs area

Table 2 shows the LEDs area description.



SYS status LED

Solid green

Solid green indicates normal operation.

Blinking green

System is booting or is in ROM monitor mode.


System error.


Power is off or system board is faulty.

ACT status LED

Solid or blinking green

Solid or blinking indicates packet activity between the forwarding and routing engine and any I/O port.


No packet transfers are occurring.



IP phone power is on.


IP phone power is not on.

PS1 / PS2


System is running.


System is not running.

Figure 3 shows the back panel of the Cisco router 3925/K9 with LEDs.

CISCO3925/K9 Back LED


① Compact flash 0 and 1 (0, right) ② ISM ③ PVDM3 0,1,2 and 3 (0, far right) ④ EN (Enable USB console) ⑤ EN (Enable RJ-45 console) ⑥ SFP S ⑦ SFP EN ⑧ S (Speed) ⑨ L (Link)

Table 3 shows the description of these LEDs on the back panel.





CompactFlash 1


Flash memory is busy.

Back Panel


Initialized with error.

Blinking Green then turns off

CompactFlash is ready for removal.

CompactFlash 0


Flash memory is busy.

Back Panel


Initialized with error.

Blinking Green then turns off

CompactFlash is ready for removal.

S (Speed)

1 blink + pause

GE port operating at 10 Mb/s.

Back Panel

2 blink + pause

GE port operating at 100 Mb/s.

3 blink + pause

GE port operating at 1000 Mb/s.

L (Link)


GE link is established.

Back Panel


No GE link is established.

EN (RJ-45 console port)


The RJ-45 console port is active.

Back Panel

EN (USB serial console port)


The USB console port is active.

Back Panel




Back Panel


Initialized with error.


Not installed.

PVDM3 0,1,2 and 3


PVDM is initialized.

Back Panel


PVDM is detected but not initialized.


No PVDM installed.


Blinking green

Blinking frequency indicates port speed.

Back Panel



Not present.

Back Panel


Present and enabled.


Present with failure.

Figure 4 shows the back panel of the Cisco 3925 router with slots and ports.

CISCO3925/K9 Back Slot


① Compact flash 0 and 1 (0, right) ② EHWIC 0,1,2 and 3 (0, far right) ③ USB serial port ④ RJ-45 serial console port ⑤ AUX port ⑥ SFP 1 and SFP 2 (2, top) 

⑦ 10/100/1000 Ethernet port GE 0/1 and GE 0/2 (GE 0/1, down) ⑧ 10/100/1000 Ethernet port GE 0/0 ⑨ USB 0 and USB 1 (1,top) ⑩ Ground ⑪ Service module slots

Figure 5 shows the SPE area and you can upgrade these slots and ports directly by one SPE module.

The Cisco 3900 Series offers field-replaceable SPEs which allow you to protect your initial investment in the Cisco 3900 platform for a longer time period and scale router performance as your network and branch-office needs grow.



Modules and License

Table 4 shows modules and licenses for this router.




Cisco Services Performance Engine 100 for Cisco 3925 ISR. (It's a configured item in the CISCO3925/K9.)


Enhanced EtherSwitch Service Module, L2/L3 switching, 16* 10/100/1000 GE ports, Enhanced POE, Cisco EnergyWise technology


Enhanced EtherSwitch Service Module, L2/L3 switching, 24 * 10/100/1000 GE ports, Enhanced POE, Cisco EnergyWise technology


Cisco Voice/WAN Card VWIC3-2MFT-G703


2-Port Serial WAN Interface Card Cisco Router High-Speed WAN Interface card


Cisco 1900, 2900, 3900 Router EHWIC WAN Card EHWIC-1GE-SFP-CU


Four port 10/100/1000 Base-TX Gigabit Ethernet switch interface card for Cisco 1900 2900 3900 Routers


Internal Services Module (ISM) with Services Ready Engine


16-channel high-density voice DSP module


256MB to 1GB Compact Flash Upgrade for Cisco 1900,2900,3900


256MB to 2GB Compact Flash Upgrade for Cisco 1900,2900,3900


256MB to 512MB CF Upgrade for Cisco 1900,2900,3900 ISR


256MB to 4GB Compact Flash Upgrade for Cisco 1900,2900,3900


1GB USB Flash Token




Cisco 3900 License L-FL-39-HSEC-K9 U.S. Export Restriction Compliance license for 3900 series


Cisco 3900 Router License - FL-39-SNA= SNA E-Delivery License for Cisco 3925/3945 for Cisco 3900 Series


Cisco Application Experience License ISR 3900 series - includes licenses for: AppX, DATA and WAASX.


Cisco 3900 License L-SL-39-SEC-K9 Security E-Delivery PAK for Cisco 3900 Series


Cisco 3900 License L-SL-39-UC-K9 Unified Communication E-Delivery PAK for Cisco 3900 Series

Datasheet Download

Cisco Router 3900 Series Datasheet.pdf

Get More Information

Do you have any question about the Cisco 3925/K9 router?

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Specification (CISCO3925/K9)

CISCO3925/K9 Specification



Cisco Systems, Inc

Manufacturer Part Number


Product Type


Form Factor

Desktop - modular - 3U

Connectivity Technology


Data Link Protocol

Ethernet, Fast Ethernet, Gigabit Ethernet


Cisco Unified Communications Manager Express sessions : 250 Cisco Unified SRST sessions : 730

Network / Transport Protocol

IPSec, PPPoE, L2TPv3

Routing Protocol

OSPF, IS-IS, BGP, EIGRP, DVMRP, PIM-SM, IGMPv3, GRE, PIM-SSM, static IPv4 routing, static IPv6 routing, policy-based

routing (PBR)

Remote Management Protocol


Encryption Algorithm



Firewall protection, VPN support, MPLS support, Syslog support, content filtering, IPv6 support, Class-Based Weighted Fair Queuing

(CBWFQ), Weighted Random Early Detection (WRED), Quality of Service (QoS), Dynamic Multipoint VPN (DMVPN)

Compliant Standards

IEEE 802.3, IEEE 802.1Q, IEEE 802.1ah, IEEE 802.1ag

DRAM Memory

1 GB (installed) / 2 GB (max)

Flash Memory

256 MB (installed) / 8 GB (max)

LED Status Lights Indicators

Link activity, power

Connectivity Slots

Router Interfaces

3 x 10Base-T/100Base-TX/1000Base-T - RJ-45
Management : 1 x console - RJ-45
Management : 1 x console - mini-USB Type B
Serial : 1 x auxiliary - RJ-45
Hi-Speed USB : 2 x 4 PIN USB Type A
2 x SFP (mini-GBIC)

Expansion Slots Total (Free)

4 ( 4 ) x EHWIC
4 ( 4 ) x PVDM
2 ( 1 ) x CompactFlash Card
1 ( 1 ) x Expansion Slot
2 ( 2 ) x service module (SM)

Power Supply

Power Device

Power supply - internal

Voltage Required

AC 120/230 V ( 47/63 Hz )

Dimensions / Weight / Miscellaneous

Dimensions (W × D × H)

18.74 × 17.24 × 5.24 in (47.6 × 43.8 × 13.3 cm)

Package Wight

61.3 lbs (27.78 Kg)


39 lbs (17.7 kg)

Compliant Standards

CISPR 22 Class A, CISPR 24, EN55024, EN55022 Class A, EN50082-1, AS/NZS 60950-1, AS/NZ 3548 Class A,

CAN/CSA-E60065-00, ICES- 003 Class A, CS-03, FCC CFR47 Part 15, EN300-386, UL 60950-1, IEC 60950-1,

EN 60950-1, CSA C22.2 No. 60065, BSMI CNS 13438

System Software

IOS Software Included

Cisco IOS IP Base


SMARTnet Support Quick Guide

Cisco SMARTnet Overview - Cisco SMARTnet Service Codes - Cisco SMARTnet Types
Cisco SMARTnet F.A.Q

CISCO3925/K9 SMARTnet Service Tool

Product Name Detail Price
CON-3SNT-3925 3YR SNTC 8X5XNBD Cisco 3925 w/SPE100 Inquiry
CON-3SNTP-3925 3YR SNTC 24X7X4 Cisco 3925 w/SPE100 Inquiry
CON-3OSP-3925 3YR SNTC 24X7X4OS Cisco 3925 w/SPE100 Inquiry
CON-SNT-3925 SNTC-8X5XNBD Cisco 3925 w/SPE100 Inquiry
CON-SNTE-3925 SNTC-8X5X4 Cisco 3925 w/SPE100 Inquiry
CON-SNTP-3925 SNTC-24X7X4 Cisco 3925 w/SPE100 Inquiry
CON-OS-3925 SNTC-8X5XNBDOS Cisco 3925 w/SPE100 Inquiry
CON-OSE-3925 SNTC-8X5X4OS Cisco 3925 w/SPE100 Inquiry
CON-OSP-3925 SNTC-24X7X4OS Cisco 3925 w/SPE100 Inquiry
CON-ECMU-3925 SWSS UPGRADES Cisco 3925 w/SPE100(3GE.4EHWIC.4DSP.2SM.256MBC Inquiry
CON-NCD2-3925 CMB SVC 24X7X2 NCD2 Cisco 3925 w/SPE100 Inquiry
CON-NCD2P-3925 CMBSV 24X7X2OS NCD2P Cisco 3925 w/SPE100 Inquiry
CON-NCD4P-3925 CMBSV 24X7X4OS NCD4P Cisco 3925 w/SPE100 Inquiry
CON-NCD4S-3925 CMB SV 8X5X4OS NCD4S Cisco 3925 w/SPE100 Inquiry
CON-NCDAU-3925 CMB SVC SAU NCDAU Cisco 3925 w/SPE100 Inquiry
CON-NCDCS-3925 CBSV 8X5XNBDOS NCDCS Cisco 3925 w/SPE100 Inquiry
CON-NCDE-3925 CMB SVC 8X5X4 NCDE Cisco 3925 w/SPE100 Inquiry
CON-NCDP-3925 CMB SVC 24X7X4 NCDP Cisco 3925 w/SPE100 Inquiry
CON-NCDS1-3925 CMBSVC 8X5XNBD NCDS1 Cisco 3925 w/SPE100 Inquiry
CON-NCDS3-3925 CMB SVC 24X7X4 NCDS3 Cisco 3925 w/SPE100 Inquiry
CON-NCDSO-3925 CMBSV 24X7X4OS NCDSO Cisco 3925 w/SPE100 Inquiry
CON-NCDT-3925 CMBSVC 8X5XNBD NCDT Cisco 3925 w/SPE100 Inquiry
CON-NCDW-3925 CMB SPT SVC SW NCDW Cisco 3925 w/SPE100 Inquiry
CON-NCF2-3925 CMB SVC 24X7X2 Cisco 3925 w/SPE100 Inquiry
CON-NCF2P-3925 CMB SVC 24X7X2OS Cisco 3925 w/SPE100 Inquiry
CON-NCF4P-3925 CMB SVC 24X7X4OS Cisco 3925 w/SPE100 Inquiry
CON-NCF4S-3925 CMB SVC 8X5X4OS Cisco 3925 w/SPE100 Inquiry
CON-NCFAU-3925 CMB SVC SAU + UPGR Cisco 3925 w/SPE100 Inquiry
CON-NCFCS-3925 CMB SVC 8X5XNBDOS Cisco 3925 w/SPE100 Inquiry
CON-NCFE-3925 CMB SVC 8X5X4 Cisco 3925 w/SPE100 Inquiry
CON-NCFP-3925 CMB SVC 24X7X4 Cisco 3925 w/SPE100 Inquiry
CON-NCFS1-3925 CMB SVC SU1 8X5XNBD Cisco 3925 w/SPE100 Inquiry
CON-NCFS3-3925 CMB SVC SU3 24X7X4 Cisco 3925 w/SPE100 Inquiry
CON-NCFSO-3925 CMBSVC SUO3 24X7X4OS Cisco 3925 w/SPE100 Inquiry
CON-NCFT-3925 CMB SVC 8X5XNBD Cisco 3925 w/SPE100 Inquiry
CON-NCFW-3925 CMB SVC SW Cisco 3925 w/SPE100 Inquiry
CON-NCH2-3925 CMB SVC 24X7X2 NCH2 Cisco 3925 w/SPE100 Inquiry
CON-NCH2P-3925 CMBSV 24X7X2OS NCH2P Cisco 3925 w/SPE100 Inquiry
CON-NCH4P-3925 CMBSV 24X7X4OS NCH4P Cisco 3925 w/SPE100 Inquiry
CON-NCH4S-3925 CMB SV 8X5X4OS NCH4S Cisco 3925 w/SPE100 Inquiry
CON-NCHAU-3925 CMB SVC SAU NCHAU Cisco 3925 w/SPE100 Inquiry
CON-NCHCS-3925 CBSV 8X5XNBDOS NCHCS Cisco 3925 w/SPE100 Inquiry
CON-NCHE-3925 CMB SVC 8X5X4 NCHE Cisco 3925 w/SPE100 Inquiry
CON-NCHP-3925 CMB SVC 24X7X4 NCHP Cisco 3925 w/SPE100 Inquiry
CON-NCHT-3925 CMBSVC 8X5XNBD NCHT Cisco 3925 w/SPE100 Inquiry
CON-NCHW-3925 CMB SPT SVC SW NCHW Cisco 3925 w/SPE100 Inquiry
CON-NCJ2-3925 CMB SVC 24X7X2 NCJ2 Cisco 3925 w/SPE100 Inquiry
CON-NCJ2P-3925 CMBSV 24X7X2OS NCJ2P Cisco 3925 w/SPE100 Inquiry
CON-NCJ4S-3925 CMB SV 8X5X4OS NCJ4S Cisco 3925 w/SPE100 Inquiry
CON-NCJAU-3925 CMB SVC SAU NCJAU Cisco 3925 w/SPE100 Inquiry
CON-NCJCS-3925 CBSV 8X5XNBDOS NCJCS Cisco 3925 w/SPE100 Inquiry
CON-NCJE-3925 CMB SVC 8X5X4 NCJE Cisco 3925 w/SPE100 Inquiry
CON-NCJT-3925 CMBSVC 8X5XNBD NCJT Cisco 3925 w/SPE100 Inquiry
CON-NCJW-3925 CMB SPT SVC SW NCJW Cisco 3925 w/SPE100 Inquiry
CON-PREM-3925 SNTC-24X7X2OS Cisco 3925 w/SPE100 Inquiry
CON-S2P-3925 SNTC-24X7X2 Cisco 3925 w/SPE100 Inquiry
CON-SAU-3925 SW APP SUPP + UPGR Cisco 3925 w/SPE100 Inquiry
CON-SU1-3925 IPS SVC. AR NBD Cisco 3925 w/SPE100 Inquiry
CON-SU2-3925 IPS SVC. AR 8X5X4 Cisco 3925 w/SPE100 Inquiry
CON-SU3-3925 IPS SVC. AR 24X7X4 Cisco 3925 w/SPE100 Inquiry
CON-SU4-3925 IPS SVC. AR 24X7X2 Cisco 3925 w/SPE100 Inquiry
CON-SUO1-3925 IPS SVC. ONSITE NBD Cisco 3925 w/SPE100 Inquiry
CON-SUO2-3925 IPS SVC.ONSITE 8X5X4 Cisco 3925 w/SPE100 Inquiry
CON-SUO3-3925 IPS SVC.ONSITE24X7X4 Cisco 3925 w/SPE100 Inquiry
CON-SUO4-3925 IPS SVC.ONSITE24X7X2 Cisco 3925 w/SPE100 Inquiry
CON-SW-3925 SMARTNET NO RMA Cisco 3925 w/SPE100 Inquiry

Faq (CISCO3925/K9)

My customer has a standard configuration for CISCO3925/k9 routers but has CISCO3945/K9 routers available from a cancelled project. Can they just copy the 3925 configuration file onto the 3945 router and it provide the functionality of the 3925?

If the two routers have same IOS (including license) and identical hardware, answer is likely yes. Or, maybe only some minor editing will be required (for example if interface numbering differs).

We have a 3925e router running IOS 15.1(4)M6. One of its current WAN connections is 1000BaseT. We want to migrate it to 1000BaseF. We have the GBIC (GLC-SX-MM) and I know I can just drop it in there.

I think you are looking for the "media-type rj45" command in interface-mode. Later you change to "media-type sfp" when you are ready to switch links.

On the Cisco ISR G2 routers with the SEC-K9 license, what tunnel count and performance throughput are available?

The SEC-K9 permanent licenses apply to the Cisco 1900, 2900, and 3900 ISR G2 platforms; these licenses limit all encrypted tunnel counts to 225 tunnels maximum for IP Security (IPsec), Secure Sockets Layer VPN (SSL VPN), a secure time-division multiplexing (TDM) gateway, and secure Cisco Unified Border Element (CUBE) and 1000 tunnels for Transport Layer Security (TLS) sessions. The SEC-K9 license limits encrypted throughput to less than or equal to 85-Mbps unidirectional traffic in or out of the ISR G2 router, with a bidirectional total of 170 Mbps. This requirement applies for the Cisco 1900, 2900, and 3900 ISR G2 platforms.

What is the exact HSEC-k9 license?

The HSEC-K9 license removes the curtailment enforced by the U.S. government export restrictions on the encrypted tunnel count and encrypted throughput. HSEC-K9 is available only on the Cisco 2921, Cisco 2951, Cisco 3925, Cisco 3945, Cisco 3925E, and Cisco 3945E. With the HSEC-K9 license, the ISRG2 router can go over the curtailment limit of 225 tunnels maximum for IP Security (IPsec) and encrypted throughput of 85-Mbps unidirectional traffic in or out of the ISR G2 router, with a bidirectional total of 170 Mbps. The Cisco 1941, 2901, and 2911 already have maximum encryption capacities within export limits.

What countries are classified license-free zones?

Countries belonging to the EU license-free zone include Australia, Austria, Belgium, Bulgaria, Canada, Cypress, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Japan, Latvia, Lithuania, Luxembourg, Malta, Netherlands, New Zealand, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom, and the United States.

What is the Cisco Services Performance Engine (SPE)?

The Cisco Services Performance Engine is the modular motherboard for the Cisco 3900 Series routers primarily responsible for the processing and forwarding of traffic. Similar to today's Cisco 3845 motherboard, the SPE houses the PVDM slots, ISM slot, and the EHWIC slots in addition to the system memory. The SPE provides a modular approach to system upgradability such that you can upgrade Cisco 3900 Series routers deployed in the field with new performance and capabilities with a simple SPE swap. This form of investment protection helps ensure that routers deployed today will be upgradable for years to come with the latest innovations without the need for complete platform replacement.

What power-supply options are available on the CISCO3925/K9 router?

The table lists the part numbers of the available power supplies for CISCO3925/K9.

AC option


AC + PoE option


DC option11


Redundant power supply


What is PoE boost?

When a Cisco 2900 is connected to an external RPS device or a Cisco 3900 is configured with a second power supply, these routers can be configured in PoE boost mode. This mode takes advantage of the increased power capacity of the second power source to power additional PoE devices beyond what a single power source could drive.

Can I reuse my existing PVDM2 DSP modules in the CISCO3925/K9?

Yes. You can install PVDM2s on the motherboard PVDM slots using the PVDM adaptor cards (PVDM2-ADPTR). You can also insert the high-density voice network modules (NM-HDV2s) with PVDM2s into the service-module slots of the Cisco 3900 Series routers by using the network module-to-service module adapter card (SM-NM-ADAPTR).

 What capacity increases can I expect for collaboration applications on the CISCO3925/K9 platforms?

Capacity increases vary across the different collaboration applications. Please refer to the applicable data sheet for specific information.

Shipping & Payment


Cargo will be delivered within 1 day after payment arrived. Tracking Number will be offered once delivery done.

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By Sea 10-20 business days


Above mentioned information are just for your reference only,we will keep you posted for the tracking delivery schedule.There are two delivery options available for by air and by sea:

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Customer Reviews

4.7 5
4.7 (11 reviews)
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars

Share your thoughts with other customers?

Posted on 3/25/2017
Verified Buyer
a good soho router

This is a Great router in SoHo environments. The feature rich IOS is always a plus.

Posted on 2/14/2017
Verified Buyer
Technical Support

The technical support is vert good, which make me trust you and buy here.

Posted on 4/15/2016
Verified Buyer

If you want to improve, you have to upgrade the hardware.

Posted on 2/6/2016
Verified Buyer
Amazing works

Amazing works throught tge house

Posted on 10/21/2015
Verified Buyer
CISCO3925/K9-up to 800 sessions

Cisco Unified Border Element capabilities for up to 800 sessions

Posted on 6/22/2014
Verified Buyer
Free CCIE solution

We didn't know what kind of router is suitable for our network. We asked this supplier for help and they really supported us free ccie solution. Many thanks!

Posted on 10/25/2013
Verified Buyer
Cisco 3925 K9

Very good and reliable router, the support for most users is probably a must.
We have a couple of these routers which we use for people to VPN in and also use it as a firewall as our Internet connection comes in on it.

Posted on 9/28/2013
Verified Buyer

The Cisco 3925, a hot item of Cisco 3900 series, is very right for today’s branch offices. Thanks for the free technical help before purchasing.

Posted on 8/3/2013
Verified Buyer
3925 SPE change

is it possible to change the SPE of a 3925 (SPE100) to an E series SPE 3925E (SPE200)? I want to keep the chassis but want to turn the router into a 3925E.

Posted on 3/14/2012
Verified Buyer


Posted on 9/9/2010
Verified Buyer

Thank you, I receive the router today, only 2 days..very fast shipping.

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